Corrêa J C F, Rocco C Chiusoli de Miranda, de Andrade D Ventura, Peres J Augusto, Corrêa F Ishida
Physical Therapy Clinic, Health Sciences Department, Nove de Julho University Center-UNINOVE, São Paulo, SP, Brazil.
Electromyogr Clin Neurophysiol. 2008 Nov-Dec;48(8):329-33.
Proceed to a comparative analysis of the electromyographic (EMG) activity of the muscles rectus femoris, vastus medialis and vastus lateralis, and to assess muscle strength and fatigue after maximal isometric contraction during knee extension. Eighteen patients with post-polio syndrome, age and weight matched, were utilized in this study. The signal acquisition system utilized consisted of three pairs of surface electrodes positioned on the motor point of the analyzed muscles. It was possible to observe with the results of this study a decreased endurance on initial muscle contraction and during contraction after 15 minutes of the initial maximal voluntary contraction, along with a muscle fatigue that was assessed through linear regression executed with Pearson's test. There were significant differences among the comparative analysis of EMG activity of the muscles rectus femoris, vastus medialis and vastus lateralis after maximal isometric contraction during knee extension. Initial muscle contraction and contraction after a 15 minute-rest from initial contraction decreased considerably, indicating a decreased endurance on muscle contraction, concluding that a lower limb muscle fatigue was present on the analyzed PPS patients.
对股直肌、股内侧肌和股外侧肌的肌电图（EMG）活动进行比较分析，并评估膝关节伸展过程中最大等长收缩后的肌肉力量和疲劳情况。本研究纳入了18例年龄和体重匹配的小儿麻痹后遗症患者。所使用的信号采集系统由三对表面电极组成，放置在被分析肌肉的运动点上。通过本研究结果可以观察到，在初始肌肉收缩时以及初始最大自主收缩15分钟后的收缩过程中，耐力下降，同时通过Pearson检验进行线性回归评估出肌肉疲劳。在膝关节伸展过程中最大等长收缩后，股直肌、股内侧肌和股外侧肌的EMG活动比较分析存在显著差异。初始肌肉收缩以及从初始收缩休息15分钟后的收缩显著下降，表明肌肉收缩耐力下降，得出结论：在所分析的小儿麻痹后遗症患者中存在下肢肌肉疲劳。
